Big Block 460 Emissions Removal
#48
You still need the brake booster and HVAC controls that come off the tree at the back of the intake manifold.
You need to find the little vacuum restrictor (plastic orifice) that goes into the yellow thermal switch that controls the distributor.
Full manifold vacuum goes to the bottom of that yellow switch, to increase the idle speed if idling and overheating.
The PVC is that metal line in the center of your 4th photo.
No need to move it.
There should be a vacuum diagram on your radiator support.
That will tell you how everything is supposed to be connected.
You need to find the little vacuum restrictor (plastic orifice) that goes into the yellow thermal switch that controls the distributor.
Full manifold vacuum goes to the bottom of that yellow switch, to increase the idle speed if idling and overheating.
The PVC is that metal line in the center of your 4th photo.
No need to move it.
There should be a vacuum diagram on your radiator support.
That will tell you how everything is supposed to be connected.
#50
#51
Join Date: Jan 2012
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You still need the brake booster and HVAC controls that come off the tree at the back of the intake manifold.
You need to find the little vacuum restrictor (plastic orifice) that goes into the yellow thermal switch that controls the distributor.
Full manifold vacuum goes to the bottom of that yellow switch, to increase the idle speed if idling and overheating.
The PVC is that metal line in the center of your 4th photo.
No need to move it.
There should be a vacuum diagram on your radiator support.
That will tell you how everything is supposed to be connected.
You need to find the little vacuum restrictor (plastic orifice) that goes into the yellow thermal switch that controls the distributor.
Full manifold vacuum goes to the bottom of that yellow switch, to increase the idle speed if idling and overheating.
The PVC is that metal line in the center of your 4th photo.
No need to move it.
There should be a vacuum diagram on your radiator support.
That will tell you how everything is supposed to be connected.
#54
Windsors take a 5/8-11 bolt, I'm not sure about the 460.
I had to have mine smogged every year, so it's still connected.
#55
#57
Join Date: Jan 2012
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I missed the white line coming off the carb in the diagram. So I need to make sure that the EGR is supplied with vac from that carb? Forgive me for my ignorance
#58
#59
Bill is the Expert at these things.
I'm sure he'll be back soon.